New York -LRB- CNN -RRB- -- Beachgoers are being warned to stay out of the water this weekend at four popular beaches around New York City after raw sewage from a Manhattan plant spilled into the Hudson River , authorities said .

Health advisories also have been issued for portions of the Hudson River , the East River , the Harlem River and the Kill Van Kull , cautioning people against participating in water-related activities such as canoeing , kayaking and swimming , according to the New York City Department of Health .

The sewage spill began Wednesday after a fire began in the engine room of the North River Wastewater Treatment Plant , according to a press release Friday from the New York City Department of Environmental Protection .

The sewage spill was stopped Friday night , and two of the engines damaged by the fire have been brought back online , the department said .

The health advisories were issued for South Beach , Midland Beach and Cedar Grove Beach on Staten Island , and Sea Gate in Brooklyn , according to the release .

The beaches are not closed , but the New York City Department of Health recommends that people not swim or enter the water at those locations . They also recommend that young and elderly people , as well as anyone suffering from a medical condition , not go near the water at those beaches .

The advisories were expected to be in place until Monday . That would encompass one of this summer 's hottest weekends , with the National Weather Service forecasting high temperatures Saturday of 99 degrees Fahreinheit and in the high 80s Sunday .

Additionally , authorities were testing the waters in the harbor and at other aquatic locales that could potentially be affected by the sewage leak , the press release said .

The plant is responsible for treating 120 million gallons of wastewater a day on Manhattan 's west side .

CNN 's Jordana Ossad and Laura Batchelor contributed to this report .

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A sewage spill at a Manhattan wastewater plant has been brought under control

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The spill occurred after a fire at the plant

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Beachgoers are urged to avoid three beaches on Staten Island and one in Brooklyn

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Authorities are warning against swimming and kayaking in the Hudson and East rivers